[Gimp-user] gimp-vectors-stroke-get-length

[dorai iyer]

David, Saul,
Thank you very much for the help. The corrected python code works and so
does the scheme code.


Your Python code would seem to define 'strokes' but then access
> 'stroke1'. Unless 'stroke1' is defined somewhere else I should suspect
> this to be problematic. (I could be missing something as I never use
> Python.)
>
> Your Scheme code looks fine except for the fact that
> 'gimp-vectors-stroke-get-length' returns a list containing just a
> single item, the length. Use 'car' instead of 'caddr' and your code
> should work.
>
> (let* (
>     (count 0)
>     (vector (car(gimp-image-get-active-vectors img)))
>     (strokes (cadr(gimp-vectors-get-strokes vector)))
>      (len (car(gimp-vectors-stroke-get-length vector
>                                                 (aref strokes count)
>                                                100.0))))
>   (print (list len vector))
>    )
>
>
>
>
> > Hi,
> > I am trying to draw a vector ( as a single polygonal line) and then
> stroke
> > it and measure its length using
> > gimp-vectors-stroke-get-length.
> >
> > So I first used python to try to do it. Here is the script
> > def vector_length(image, drawable):
> >     vectors = pdb.gimp_image_get_active_vectors(image)
> >     strokes = pdb.gimp_vectors_get_strokes(vectors)
> >     len1 = pdb.gimp_vectors_stroke_get_length(vectors, stroke1, 100.0)
> > the vectors and strokes went fine but I could not get the length
> >
> > I then thought maybe I should try using tinyscheme and tried the
> following
> >   (let* (
> >         (count 0)
> >         (vector (car(gimp-image-get-active-vectors img)))
> >         (strokes (cadr(gimp-vectors-get-strokes vector)))
> >         (len (caddr(gimp-vectors-stroke-get-length vector (aref strokes
> > count) 100.0)))
> >      )
> >     (print (list len vector))
> > I still get an unbound variable error. a search fo previous
> implementations
> > did not show much. Has anyone used
> > gimp-vectors-stroke-get-length
> > in either scm or python successfully and can help resolve my problem. I
> am
> > more familaiar with python then tinyscheme but not adept at either which
> is
> > probably clearly reflected in my programming.
> > Thanks for the help.
> >
>
>
>
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